A standard Brinell hardness tester was used to evaluate the
hardness of a steel
before and after nitriding the surface. The standard 3000 kgf was
applied to the indenter to
create indents from a 10 mm hardened steel ball. The indents after
testing were measured as 4.5
and 5.5 mm in diameter, respectively. What is the Brinell hardness
(HB) of the steel before and
after nitriding? What is the percent increase of the hardness?
Estimate the ultimate tensile
strengths of the steels.
A standard Brinell hardness tester was used to evaluate the hardness of a steel before and...
Please explain every thing. Please write in the paper and then take a photo. 2.59 The Brinell hardness test is used to measure the indentation hardness of materials. It involves penetration of an indenter, in the form of a ball of diameter D (mm), under a load P (kg) as shown in Fig. 2.13a. The Brinell hardness number (BHN) is defined as 2P where A (in mm2) is the spherical surface area and d (in mm) is the diameter of...
please make sure it is correct Calculate the indentation diameter created by a Brinell hardness test where an application of 3000 Kgf force results in a BHN of 560 with an indenter diameter of 10 mm. 4.81 mm 01 2.59 mm OD 3.41mm O IV 7.46 mm
Brief Background Penetration hardness is a measure of a materials resistance to indentation. The Rockwell Hardness test is a standard method for characterizing this property of a material. It uses a small indenter, either a hardened ball or diamond cone (Brale), which is pressed into the sample while measuring depth of penetration. There are several scales to select from as indicated in textbook or the chart found in lab. Each scale refers to the type of indenter used and the...
I. (SI units) Low-carbon steel with tensile strength-300 MPa, shear strength-220 MPa, and Brinell hardness of 225 HB is turned at a cutting speed-2.5 m/s. Feed-0.20 mm/rev and depth of cut- 3.0 mm. Rake angle - 5° in the direction of chip flow. The resulting chip ratio 0.45. Using the orthogonal model to approximate turning, determine (a) cutting force, (b) feed force, and (c) compute the required power, if mechanical efficiency-80%. (30 points) (Hint: correction factor for the volume specific...
I. (SI units) Low-carbon steel with tensile strength-300 MPa, shear strength-220 MPa, and Brinell hardness of 225 HB is turned at a cutting speed-2.5 m/s. Feed-0.20 mm/rev and depth of cut- 3.0 mm. Rake angle - 5° in the direction of chip flow. The resulting chip ratio 0.45. Using the orthogonal model to approximate turning, determine (a) cutting force, (b) feed force, and (c) compute the required power, if mechanical efficiency-80%. (30 points) (Hint: correction factor for the volume specific...
It is desired to evaluate the tensile properties of an aluminum alloy. A tensile test is performed using a standard cylindrical tensile specimen with a diameter of 12.8 mm and a gauge length of 50.800 mm. The gage length and final diameter of the sample are measured after the sample is removed from the testing machine. The gage length and the diameter of the necked region after the specimen was removed from the testing machine are 60 mm and 9...
I have a question during my Tensile Test of Sturctural Steel. Ive collected all the data, can you calculate the Elastic Modulus and referring to the stress strain curve of your samples , discuss and compare the results, specify the similarities and differences if there is any and provide possible reasons. Thanks Date of Lab Mark (for tutor only) 1. General information of the sample: Web sample or flange sample? web Specimen dimension (Before Testing) Width, mm Gauge length, mm...
summatize the following info and break them into differeng key points. write them in yojr own words apartus 6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...
summarizr the followung info and write them in your own words and break them into different key points. 6.5 Metering Chamber: 6.5.1 The minimum size of the metering box is governed by the metering area required to obtain a representative test area for the specimen (see 7.2) and for maintenance of reasonable test accuracy. For example, for specimens incorporating air spaces or stud spaces, the metering area shall span an integral number of spaces (see 5.5). The depth of...